English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present STEREO observations within 1500 proton gyroradii of 12interplanetary shocks, with long-duration burst mode electric field acquisitionby S/WAVES enabling observation of the evolution of waves throughout the entireramp of interplanetary shocks. The shocks are low Mach number ($M_{f} \sim$1--5), quasi-perpendicular ($\theta_{Bn} \geq 45^{\circ}$), with beta($\beta$) $\sim $0.2--1.8. High variability in frequency, amplitude, and wavemode is observed upstream, downstream, and in shock ramps. Observations inevery region include ion acoustic-like waves, electron cyclotron driftinstability driven waves, electrostatic solitary waves, and high frequencywhistler mode waves. We also show for the first time the existence of"dispersive" electrostatic waves with frequencies in the ion acoustic range andthe first observations of electron cyclotron drift instability (ECDI) drivenwaves at interplanetary shocks. Large amplitude waves are bursty and seen inall three regions with amplitudes from $\sim$5 to $>$ 200 mV/m. All wave modesare more commonly observed downstream of the shocks than upstream of them,usually within $\sim$ 63000 km ($\sim 1500 \rho_{gi}$) of the ramp.

The Rapid Variability of Electric Field Waves within and near interplanetary shock ramps: STEREO Observations